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Scientific Articles   |    
Comparison of the Norwegian Knee Arthroplasty Register and a United States Arthroplasty Registry
Elizabeth W. Paxton, MA1; Ove Furnes, MD, PhD2; Robert S. Namba, MD3; Maria C.S. Inacio, MS1; Anne M. Fenstad, MSc2; Leif I. Havelin, MD, PhD4
1 Department of Surgical Outcomes and Analysis, Kaiser Permanente, 3033 Bunker Hill Street, San Diego, CA 92109. E-mail address for E.W. Paxton: liz.w.paxton@kp.org
2 The Norwegian Arthroplasty Register, Department of Orthopaedic Surgery, Haukeland University Hospital, N-5021 Bergen, Norway
3 Department of Orthopedic Surgery, Kaiser Permanente Orange County, Southern California Permanente Medical Group, 6670 Alton Parkway, Irvine, CA 92618
4 The Norwegian Arthroplasty Register, Department of Surgical Sciences, University of Bergen, N-5021 Bergen, Norway
View Disclosures and Other Information
Disclosure: None of the authors received payments or services, either directly or indirectly (i.e., via his or her institution), from a third party in support of any aspect of this work. None of the authors, or their institution(s), have had any financial relationship, in the thirty-six months prior to submission of this work, with any entity in the biomedical arena that could be perceived to influence or have the potential to influence what is written in this work. Also, no author has had any other relationships, or has engaged in any other activities, that could be perceived to influence or have the potential to influence what is written in this work. The complete Disclosures of Potential Conflicts of Interest submitted by authors are always provided with the online version of the article.

  • Disclosure statement for author(s): PDF

Investigation performed at the Department of Surgical Outcomes and Analysis, Kaiser Permanente, San Diego, California, The Norwegian Arthroplasty Register, Haukeland University Hospital, Bergen, and the Department of Surgical Sciences, University of Bergen, Bergen, Norway

Copyright © 2011 by The Journal of Bone and Joint Surgery, Inc.
J Bone Joint Surg Am, 2011 Dec 21;93(Supplement 3):20-30. doi: 10.2106/JBJS.K.01045
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Abstract

Abstract: 

Several national total joint arthroplasty registries exist outside of the United States (U.S.) and have been used to compare rates and outcomes of total knee arthroplasty. Within the U.S., regional arthroplasty registries provide an opportunity to compare U.S. practices and outcomes with those of other countries. The purpose of this study was to compare the demographics, choice of implants, techniques, and outcomes of total knee arthroplasties in Norway to those from a large, U.S. integrated health-care system and to determine the feasibility of using aggregate-level data for international registry comparisons. The study sample consisted of 25,004 primary total knee arthroplasties performed in Norway and 56,208 from the Kaiser Permanente health-care system. Summary-level data were used to compare the two cohorts. At the time of the seven-year follow-up, the cumulative survival of the total knee prosthesis was 94.8% for the arthroplasties performed in Norway and 96.3% for those performed at Kaiser Permanente. The primary reasons for revision arthroplasty included infection, instability, pain, and aseptic loosening. Patient characteristics, selection of implants, surgical techniques, and outcomes differed between the cohorts. Harmonization of data elements and definitions is necessary for future international research.

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    Accreditation Statement
    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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